Out of those letters, I'd try America.
England
Austria
Rearranging these letters gives you the name of a country. The country is England.
The country with the most letters in its name is the United Kingdom.
No country has all of those letters in a single name.
One country that fits your criteria is Finland. It has seven letters, the third letter is 'n,' and the sixth letter is 'a.'
America
Harriet Tubbman
You have the name of the country China.
European countries that have seven letters in their name are:AlbaniaAndorraAustriaBelgiumCroatiaDenmarkEnglandEstoniaFinlandGeorgiaGermanyHungaryIcelandIrelandMoldovaRomaniaUkraine
There is no country name that can be spelled with the letters 'jyqlramejiwv'.